import org.eclipse.jface.text.IDocument;
/**
- * Reads from a document either forwards or backwards. May be configured to
- * skip comments and strings.
+ * Reads from a document either forwards or backwards. May be configured to skip
+ * comments and strings.
*/
public class PHPCodeReader extends SingleCharReader {
-
+
/** The EOF character */
- public static final int EOF= -1;
-
- private boolean fSkipComments= false;
- private boolean fSkipStrings= false;
- private boolean fForward= false;
-
+ public static final int EOF = -1;
+
+ private boolean fSkipComments = false;
+
+ private boolean fSkipStrings = false;
+
+ private boolean fForward = false;
+
private IDocument fDocument;
+
private int fOffset;
-
- private int fEnd= -1;
- private int fCachedLineNumber= -1;
- private int fCachedLineOffset= -1;
-
-
+
+ private int fEnd = -1;
+
+ private int fCachedLineNumber = -1;
+
+ private int fCachedLineOffset = -1;
+
public PHPCodeReader() {
}
-
+
/**
- * Returns the offset of the last read character. Should only be called after read has been called.
+ * Returns the offset of the last read character. Should only be called
+ * after read has been called.
*/
public int getOffset() {
- return fForward ? fOffset -1 : fOffset;
+ return fForward ? fOffset - 1 : fOffset;
}
-
- public void configureForwardReader(IDocument document, int offset, int length, boolean skipComments, boolean skipStrings) throws IOException {
- fDocument= document;
- fOffset= offset;
- fSkipComments= skipComments;
- fSkipStrings= skipStrings;
-
- fForward= true;
- fEnd= Math.min(fDocument.getLength(), fOffset + length);
+
+ public void configureForwardReader(IDocument document, int offset,
+ int length, boolean skipComments, boolean skipStrings)
+ throws IOException {
+ fDocument = document;
+ fOffset = offset;
+ fSkipComments = skipComments;
+ fSkipStrings = skipStrings;
+
+ fForward = true;
+ fEnd = Math.min(fDocument.getLength(), fOffset + length);
}
-
- public void configureBackwardReader(IDocument document, int offset, boolean skipComments, boolean skipStrings) throws IOException {
- fDocument= document;
- fOffset= offset;
- fSkipComments= skipComments;
- fSkipStrings= skipStrings;
-
- fForward= false;
+
+ public void configureBackwardReader(IDocument document, int offset,
+ boolean skipComments, boolean skipStrings) throws IOException {
+ fDocument = document;
+ fOffset = offset;
+ fSkipComments = skipComments;
+ fSkipStrings = skipStrings;
+
+ fForward = false;
try {
- fCachedLineNumber= fDocument.getLineOfOffset(fOffset);
+ fCachedLineNumber = fDocument.getLineOfOffset(fOffset);
} catch (BadLocationException x) {
throw new IOException(x.getMessage());
}
}
-
+
/*
* @see Reader#close()
*/
public void close() throws IOException {
- fDocument= null;
+ fDocument = null;
}
-
+
/*
* @see SingleCharReader#read()
*/
throw new IOException(x.getMessage());
}
}
-
+
private void gotoCommentEnd() throws BadLocationException {
while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
+ char current = fDocument.getChar(fOffset++);
if (current == '*') {
if (fOffset < fEnd && fDocument.getChar(fOffset) == '/') {
- ++ fOffset;
+ ++fOffset;
return;
}
}
}
}
-
+
private void gotoStringEnd(char delimiter) throws BadLocationException {
while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
+ char current = fDocument.getChar(fOffset++);
if (current == '\\') {
// ignore escaped characters
- ++ fOffset;
+ ++fOffset;
} else if (current == delimiter) {
return;
}
}
}
-
+
private void gotoLineEnd() throws BadLocationException {
- int line= fDocument.getLineOfOffset(fOffset);
- fOffset= fDocument.getLineOffset(line + 1);
+ int line = fDocument.getLineOfOffset(fOffset);
+ fOffset = fDocument.getLineOffset(line + 1);
}
-
+
private int readForwards() throws BadLocationException {
while (fOffset < fEnd) {
- char current= fDocument.getChar(fOffset++);
-
+ char current = fDocument.getChar(fOffset++);
+
switch (current) {
- case '#':
-
- if (fSkipComments && fOffset < fEnd) {
- gotoLineEnd();
- continue;
- }
-
- return current;
-
- case '/':
-
- if (fSkipComments && fOffset < fEnd) {
- char next= fDocument.getChar(fOffset);
- if (next == '*') {
- // a comment starts, advance to the comment end
- ++ fOffset;
- gotoCommentEnd();
- continue;
- } else if (next == '/') {
- // '//'-comment starts, advance to the line end
- gotoLineEnd();
- continue;
- }
- }
-
- return current;
-
- case '"':
- case '\'':
-
- if (fSkipStrings) {
- gotoStringEnd(current);
+ case '"':
+ case '\'':
+
+ if (fSkipStrings) {
+ gotoStringEnd(current);
+ continue;
+ }
+
+ return current;
+ case '#':
+
+ if (fSkipComments && fOffset < fEnd) {
+ gotoLineEnd();
+ continue;
+ }
+
+ return current;
+
+ case '/':
+
+ if (fSkipComments && fOffset < fEnd) {
+ char next = fDocument.getChar(fOffset);
+ if (next == '*') {
+ // a comment starts, advance to the comment end
+ ++fOffset;
+ gotoCommentEnd();
+ continue;
+ } else if (next == '/') {
+ // '//'-comment starts, advance to the line end
+ gotoLineEnd();
continue;
}
-
- return current;
+ }
+
+ return current;
+
}
-
+
return current;
}
-
+
return EOF;
}
-
+
private void handleSingleLineComment() throws BadLocationException {
- int line= fDocument.getLineOfOffset(fOffset);
+ int line = fDocument.getLineOfOffset(fOffset);
if (line < fCachedLineNumber) {
- fCachedLineNumber= line;
- fCachedLineOffset= fDocument.getLineOffset(line);
- int offset= fOffset;
+ fCachedLineNumber = line;
+ fCachedLineOffset = fDocument.getLineOffset(line);
+ int offset = fOffset;
while (fCachedLineOffset < offset) {
- char current= fDocument.getChar(offset--);
- if (current == '/' && fCachedLineOffset <= offset && fDocument.getChar(offset) == '/') {
- fOffset= offset;
+ char current = fDocument.getChar(offset--);
+
+ if (current == '/' && fCachedLineOffset <= offset
+ && fDocument.getChar(offset) == '/') {
+ fOffset = offset;
+ return;
+ }
+
+ if (current == '#' && fCachedLineOffset <= offset) {
+ fOffset = offset;
return;
}
- if (current == '#' && fCachedLineOffset <= offset) {
- fOffset= offset;
- return;
- }
}
}
}
-
+
private void gotoCommentStart() throws BadLocationException {
while (0 < fOffset) {
- char current= fDocument.getChar(fOffset--);
- if (current == '*' && 0 <= fOffset && fDocument.getChar(fOffset) == '/')
+ char current = fDocument.getChar(fOffset--);
+ if (current == '*' && 0 <= fOffset
+ && fDocument.getChar(fOffset) == '/')
return;
}
}
-
+
private void gotoStringStart(char delimiter) throws BadLocationException {
while (0 < fOffset) {
- char current= fDocument.getChar(fOffset);
+ char current = fDocument.getChar(fOffset);
if (current == delimiter) {
- if ( !(0 <= fOffset && fDocument.getChar(fOffset -1) == '\\'))
+ if (!(0 <= fOffset && fDocument.getChar(fOffset - 1) == '\\'))
return;
}
- -- fOffset;
+ --fOffset;
}
}
-
+
private int readBackwards() throws BadLocationException {
-
+
while (0 < fOffset) {
- -- fOffset;
-
+ --fOffset;
+
handleSingleLineComment();
-
- char current= fDocument.getChar(fOffset);
+
+ char current = fDocument.getChar(fOffset);
switch (current) {
- case '/':
-
- if (fSkipComments && fOffset > 1) {
- char next= fDocument.getChar(fOffset - 1);
- if (next == '*') {
- // a comment ends, advance to the comment start
- fOffset -= 2;
- gotoCommentStart();
- continue;
- }
- }
-
- return current;
-
- case '"':
- case '\'':
-
- if (fSkipStrings) {
- -- fOffset;
- gotoStringStart(current);
+ case '/':
+
+ if (fSkipComments && fOffset > 1) {
+ char next = fDocument.getChar(fOffset - 1);
+ if (next == '*') {
+ // a comment ends, advance to the comment start
+ fOffset -= 2;
+ gotoCommentStart();
continue;
}
-
- return current;
+ }
+
+ return current;
+ case '"':
+ case '\'':
+
+ if (fSkipStrings) {
+ --fOffset;
+ gotoStringStart(current);
+ continue;
+ }
+
+ return current;
}
-
+
return current;
}
-
+
return EOF;
}
}
-
git://git.phpeclipse.com / phpeclipse.git / blobdiff